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Vietnam Unlimited 20-Day eSIM – Your Complete Mobile Solution for Longer Trips
Planning a proper Vietnam adventure? Whether you're working remotely from Da Nang, exploring the Mekong Delta, or hopping between Hanoi and Ho Chi Minh City, staying connected for 20 days straight shouldn't break the bank—or your data limit.
TadiSim's 20-Day Unlimited plan hooks you up with 5GB of premium 4G/LTE data every single day, a real local Vietnamese number (+84), and enough calling credits to sort out all your bookings, tours, and Grab rides. No hunting for WiFi. No surprise roaming charges. Just reliable connectivity from day one to day twenty.
✅ Here's What You're Getting:
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5GB High-Speed Data Every Day (that's 100GB total over 20 days)
We use Viettel and Vinaphone networks—the two most reliable carriers in Vietnam. You'll get solid 4G/LTE speeds whether you're in a bustling city or a quiet mountain town.
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Unlimited Data at Reduced Speed
Burned through your 5GB for the day? No worries. You can still browse, check emails, and use Maps at around 1 Mbps. It's not lightning-fast, but it's enough to stay connected when you need it. And your 5GB resets every 24 hours—fresh start, every day.
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Real Vietnamese Phone Number (+84)
This isn't some virtual number that doesn't work with local apps. You'll get a genuine +84 mobile number that receives calls and SMS instantly. Critical for Grab drivers trying to find you, hotel confirmations, and those annoying bank OTPs.
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100 Minutes of Local Calls
Need to call your hotel in Hoi An? Confirm your Ha Long Bay cruise? Ring up a local tour operator? You've got 100 minutes to use however you want. No per-minute charges, no hidden fees.
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100 Free SMS
Verification codes, booking confirmations, quick messages to local contacts—100 SMS covers you for the whole trip.
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Hotspot/Tethering Fully Supported
Traveling with a partner? Working from your laptop? Share your data connection with other devices at no extra cost. We don't throttle or block tethering like some carriers do.
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Nationwide Coverage That Actually Works
Viettel and Vinaphone cover pretty much everywhere travelers go: Hanoi, Ho Chi Minh City, Da Nang, Hoi An, Nha Trang, Hue, Dalat, Sapa, Ha Long Bay, Phu Quoc, Con Dao, and most rural areas. (Look, there might be a few remote mountain villages where signal gets spotty, but that's true for any carrier.)
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20-Day Validity
The clock starts ticking when you first connect to a Vietnamese network—not when you buy it. So install it before you leave home, and activate it whenever you land.
🤔 Why TadiSim Beats the Competition:
vs. Airalo & Nomad (Data-Only eSIMs)
Here's the thing: Airalo and Nomad are fine if you just need data. But they don't give you a local phone number. That means:
❌ Grab drivers can't call you when they're lost
❌ You can't receive OTP codes for banking apps or booking confirmations
❌ No way to make local calls if you need to change a reservation
We include a real +84 number + 100 minutes + 100 SMS. For travelers who actually need to communicate (not just scroll Instagram), this makes a huge difference.
vs. Holafly (Unlimited "Everything")
Holafly's unlimited plans cost $69-89 for 15-20 days. That's steep. And they don't include a local number or calling minutes.
Our take: Most travelers don't need truly unlimited high-speed data. 5GB per day is loads for streaming, maps, video calls, and social media. You save $20-40, get a local number, and still have unlimited backup data at reduced speed. Smarter value.
vs. Buying a Physical SIM at the Airport
Sure, you could queue at Noi Bai or Tan Son Nhat airport for 30-45 minutes, fill out forms, show your passport, scan your fingerprint, and hope the vendor speaks English.
Or you could buy this eSIM tonight, install it in 2 minutes, and land in Vietnam with data already working. Your call.
⚡ Setup Takes Literally 60 Seconds
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Order now – We'll email your QR code instantly (check spam folder if you don't see it)
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Scan the QR code – Do this before you leave home or after you land (just need WiFi)
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Label it "Vietnam Data" – Keep your home SIM active if you want, or remove it entirely
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Land in Vietnam, turn on data roaming – You'll connect automatically. Done.
Pro tip: Install the eSIM before you board your flight. That way you're not fumbling with QR codes while jetlagged at the airport.
👥 This Plan Is Perfect If You're:
- Spending 2-3 weeks in Vietnam (obviously)
- Working remotely and need reliable data for Zoom/Slack
- Traveling as a couple or family and want to share data via hotspot
- Visiting multiple cities/regions and need consistent coverage
- Tired of hunting for WiFi cafes and unreliable hotel internet
- Someone who actually needs to make local calls (booking tours, contacting hotels, etc.)
📊 Quick Reality Check: Is 5GB/Day Enough?
For most travelers, absolutely. Here's what 5GB daily actually gets you:
- ✅ Social media (Facebook, Instagram, TikTok): 2-3 hours
- ✅ Google Maps navigation: 4-5 hours
- ✅ Music streaming (Spotify, Apple Music): 10+ hours
- ✅ Video calls (Zoom, WhatsApp, Skype): 1.5-2 hours
- ✅ Email, messaging, web browsing: unlimited
- ✅ YouTube/Netflix (standard quality): 1.5-2 hours
Heavy users: If you're streaming 4K video all day or downloading huge files, you might burn through 5GB. But even then, you've got unlimited backup at 1 Mbps for essentials.
Light users: If you mostly use Maps, WhatsApp, and check email, 5GB is overkill (in a good way).
✅ 5GB high-speed 4G/LTE data daily (100GB total) + unlimited at reduced speed
✅ Real +84 Vietnamese phone number included
✅ 100 free local calling minutes + 100 SMS
✅ Full hotspot/tethering support—share with laptop or travel buddies
✅ Instant email delivery with QR code—no waiting
✅ No contracts, no hidden fees, no biometric registration
✅ Coverage nationwide: cities, beaches, mountains, rural areas
✅ Compatible with all unlocked eSIM devices (iPhone XS+, Samsung S20+, Pixel 3+)
✅ 20-day validity—perfect for extended trips
✅ Activates automatically on arrival—install before you fly
❓ Frequently Asked Questions
What exactly does "unlimited" mean here?
Great question. You get 5GB of high-speed 4G/LTE data every single day. Once you use that up, your speed drops to about 1 Mbps, but you can still use data as much as you want—no hard cutoff. Think of it as "unlimited basic data" after your high-speed quota. And the best part: your 5GB resets every 24 hours, so you get a fresh batch daily.
Is 5GB per day actually enough for 20 days?
For 95% of travelers, yes. We've had thousands of customers use this plan, and very few run out of high-speed data before the daily reset. Unless you're streaming Netflix in 4K for hours every day or constantly downloading large files, 5GB handles maps, social media, video calls, music, and browsing with room to spare. And if you do burn through it, you've still got unlimited at 1 Mbps as a backup.
Will this work in rural areas or just big cities?
We use Viettel and Vinaphone networks, which have the best coverage in Vietnam. You'll get solid signal in all major cities (Hanoi, HCMC, Da Nang, Nha Trang, etc.), tourist hotspots (Hoi An, Ha Long Bay, Sapa, Dalat, Hue), and most rural areas. There are some super remote mountain villages or islands where signal gets patchy, but that's true for any carrier. If you're sticking to typical traveler routes, you'll be fine.
Can I really make calls? How does that work?
Yep! You get 100 minutes to call any Vietnamese number. Your eSIM comes with a real +84 phone number, so you can call hotels, tour operators, Grab drivers, restaurants—whatever. Just dial normally from your phone. International calls aren't included (that'd get expensive), but local calls are covered. And you can receive calls on your Vietnamese number too, though most travelers just use it for outgoing calls and SMS.
My phone is [insert model]. Will it work?
Your phone needs two things: it must be unlocked (not tied to a specific carrier) and eSIM-compatible.
eSIM-compatible phones include:
• iPhone XS, XR, or newer (all models)
• Samsung Galaxy S20 or newer (S21, S22, S23, S24, Z Fold/Flip series)
• Google Pixel 3 or newer (3, 4, 5, 6, 7, 8)
• Most recent iPad Pro/Air models
Not sure? Go to Settings > Cellular/Mobile Data. If you see an option to "Add eSIM" or "Add Cellular Plan," you're good. If not, check our full compatibility guide or message us.
Do I need to keep my physical SIM card in?
Up to you. Most people use Dual SIM mode: keep your home physical SIM active for calls/SMS (so people can still reach you), and use the eSIM for data in Vietnam. Modern phones handle this seamlessly. If you don't care about receiving calls on your home number, you can remove the physical SIM entirely and just use the eSIM.
When exactly does the 20-day period start?
Your plan activates when you first connect to a Vietnamese network—not when you buy it. So if you purchase today but don't travel for 3 weeks, that's fine. You have 90 days from purchase to activate. Once you land in Vietnam and turn on data roaming, the 20-day clock starts. Simple.
What if I leave Vietnam and come back during the 20 days?
This eSIM only works within Vietnam. If you hop over to Cambodia, Laos, or Thailand, you'll lose connection. The 20-day clock keeps ticking even if you leave. If you're doing multi-country travel, check out our Asia Regional eSIM instead.
How fast is the "reduced speed" after I use 5GB?
Approximately 1 Mbps. That's enough for:
✅ Sending/receiving emails
✅ WhatsApp/text messaging
✅ Google Maps navigation
✅ Basic web browsing
✅ Low-quality music streaming
It's NOT great for:
❌ Video calls (will be choppy)
❌ YouTube/Netflix streaming
❌ Social media with lots of images/video
❌ Large file downloads
But remember: your 5GB resets every 24 hours, so you're only at reduced speed until your next daily refresh.
Can I share my data with my partner/family?
Absolutely! Hotspot/tethering is fully supported. Turn your phone into a WiFi hotspot and connect your partner's phone, your laptop, tablet—whatever. No extra fees, no restrictions. Just keep in mind that shared usage counts toward your 5GB daily quota, so if two people are streaming video, you might burn through it faster.
What if it doesn't work? What's your refund policy?
We want this to work flawlessly for you. If you have technical issues we can't resolve, we offer a full refund within 30 days of purchase—as long as you haven't used more than 100MB of data. Our support team responds within 2 hours (usually faster) via email or chat. We'll walk you through troubleshooting, and if it's a compatibility issue or our fault, you get your money back. No hassle.
I'm staying longer than 20 days. What should I do?
You've got options:
1. Buy another 20-day plan before this one expires
2. Upgrade to our 30-day plan (better value for extended stays)
3. Contact us—we can sometimes offer custom packages for long-term travelers
Just don't wait until the last day to figure it out. Set a reminder for Day 18!
Do I need to register my passport or do biometric verification?
Nope! That's one of the best things about eSIMs. When you buy a physical SIM at a Vietnamese airport, they make you fill out forms, scan your passport, and sometimes take your fingerprint. With TadiSim eSIM, you buy online, get your QR code instantly, and install it yourself. Zero paperwork, zero queues, zero biometric nonsense.
⭐⭐⭐⭐⭐ 4.9/5 from 847 reviews
"Worked flawlessly for my 3-week Vietnam trip. Saved me so much hassle!" - Sarah M., Australia
